Tree References & Resources
Understanding Your Soil Test Results
Additional Lime, Cultural and Management Tips
- Colorado and Norway spruce grow best at pH 6.0 or above. If planting these types and soil pH is less than 5.8, add approximately 6 lbs (6 cups) lime within the expected mature tree drip line (minimum 3 ft by 3 ft) and incorporate to a depth of 6 to 8 inches prior to planting.
- White and red cedar grow best at pH 6.8 or higher. If planting these types, and soil pH is less than 6.6, add 9 lbs (9 cups) lime within the expected mature tree drip line (minimum 3 ft by 3 ft) and incorporate to a depth of 6 to 8 inches prior to planting.
- Black walnut and Kentucky coffee tree grow best at pH 6.8 or above. If planting these types and soil pH is less than 6.6, add approximately 9 lbs (9 cups) lime within the expected mature tree drip line (minimum 3 ft by 3 ft) and incorporate to a depth of 6 to 8 inches prior to planting.
- Adding large quantities of organic amendments to the planting hole is usually not a good practice. If soils are ‘heavy’ and have poor drainage, the extreme textural and soil structural differences between the hole and the area surrounding the hole may inhibit roots from extending beyond the altered area. It is best to plant trees and shrubs in existing soil, even if it is not ideal. Choosing a species that can adapt to these less than ideal existing conditions may be more practical.
Evergreens Planting and Care (A1730)
Calibrating and Using Fertilizer and Lime Spreaders (A2306)
Trees and Shrub Fertilization (A2308)
Guide to Garden Fertilizer Recommendations